RSTP synchronization is not widely understood and often oversimplified. This post describes how it really works in detail to give you the full picture.
Busting myths – Spanning tree portfast on the interface
I would like to bust a common myth. One that I’m probably guilty of preaching before as well. We all know that when portfast is enabled the port will bypass the listening and learning phase of STP. Portfast can be
STP session up @ CLN
Hi, I’m done with the two Spanning Tree Protocol webinars at the Cisco Learning Network. You can find them here. They are located under the Routing&Switching section. Now on to CCDE studies!
I’m doing two lectures at Cisco Learning Network on spanning tree
Hi guys, I am going to be doing two lectures on spanning tree over at the Cisco Learning Network. The first one will be aimed for CCNA level plus and the second one will be aimed for CCNP level plus.
STP convergence – MST
In the comments I received a wish to compare RPVST+ with MST. RPVST+ is Ciscos proprietary STP running one instance per VLAN over 802.1Q trunks. MST is an industry standard which can run multiple instances but not one per VLAN.
Spanning tree convergence
Someone asked the other day how fast STP converges depending on PVST+ or RPVST+ or MST is running. Usually the answer for PVST+ is 30-50 seconds and for RPVST+ it’s fast, maybe less than a second. I thought I would
Spanning tree – notes
Electing the root Only one switch can be the root bridge. From the start all switches announce themselves as the root, when a switch hears of a superior BPDU it stops announcing itself as the root and instead forwards the
Spanning tree
Been really busy lately with a big migration at work so studying is though but have been studying some spanning tree. I have used the IEEE 802.1D-1998 and 802.1D-2004 documents for 802.1D and 802.1W but these documents are almost too